@physicswithphysics: How can a train travel beneath the sea? 🌊🚆 The Channel Tunnel is far more than a railway beneath the English Channel. It is a remarkable combination of geology, pressure, mechanics, surveying, aerodynamics, heat transfer, and engineering. In this 100-second journey, see the physics behind the Channel Tunnel—from choosing the right rock and cutting through it with massive tunnel-boring machines to achieving extraordinary underground alignment, designing three parallel tunnels, controlling the piston effect of fast-moving trains, and removing the heat generated deep underground. A huge engineering achievement—but underneath it all, physics makes it possible. Physics with Physics — Learn the physics behind the world around us. #Physics #Engineering #ChannelTunnel #AppliedPhysics #PhysicsWithPhysics